perch_blog_sections() Inconsistent behavior

I'm trying to work with perch_blog_sections(). Using:

$sectionsArray = perch_blog_sections(array(
                          'skip-template' => true,
                  ));
var_dump($sectionsArray);

On first load I get an array like this:

array(2) {
    [0]=> array(7) {
        ["sectionID"]=> string(2) "10"
        ["sectionTitle"]=> string(5) "Bikes"
        ["sectionSlug"]=> string(5) "bikes"
        ["sectionPostCount"]=> string(1) "1"
        ["sectionDynamicFields"]=> string(2) "[]"
        ["_id"]=> string(2) "10"
        ["qty"]=> string(1) "1"
    }
    [1]=> array(7) {
        ["sectionID"]=> string(2) "11"
        ["sectionTitle"]=> string(4) "Life"
        ["sectionSlug"]=> string(4) "life"
        ["sectionPostCount"]=> string(1) "3"
        ["sectionDynamicFields"]=> string(2) "[]"
        ["_id"]=> string(2) "11"
        ["qty"]=> string(1) "3"
    }
}

^ This makes sense and is something I'm trying to work with. However, when I refresh the page or otherwise revisit the page I get this output:

string(10) "ArrayArray"

Which is not useful. If I shut down my local server and reopen the page I get the first array again. Then upon revisiting I just get a string again.

ANy thoughts on what is going on? Thanks!